I personally wouldn't class Kabbalah as a myth, in the truest sense. While many a different myth can be applied to Kabbalah, depending on your own personal bent. Kabbalah is more an active practice. Like yoga, or buddhist meditations. You're right in saying it is very heavily influenced by eastern philosophy, but Jesus clearly was as well.
Where a Gnostic may simply enter the sacred space to 'commune' with god, the Kabbalist will enter many different states as well. Some of these different states providing different perspectives on the nature of reality.
I highly recommend Dion Fortune's, The Mystical Qabalah, for the best, modern interpretation of the system
I see your interpretation as perfectly valid, but my personal slant on things differs slightly.
The sparks within us, are everywhere, on all points of the grid. Allowing the divine spark to flow through any combination of matter you can conceive. Nothing can stop the spark.
I consider this spark to be a quantized, discreet unit of the all pervading, fundamental consciousness field. The wave as the particle.
So I see this fundamental unit as our soul. Our souls have been around long enough to have grown though atoms, gas, stars, planets, animals, and now self aware beings. It is at this point the soul can now begin to direct it's progress instead of being subject to the whims of chaos. Our souls need to fully incorporate, and understand the mind (which is a product of the body) to gain a deeper understanding, and so, freedom.
Kabbalah, amonst other systems, IMO, provide at least very good groundwork for acheiving this.